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A 36-year old woman presented with headaches and focal seizures affecting language and the right side of her body.
Left (left internal carotid angiogram - lateral projection); Right (left internal carotid angiogram - left AP projection). Arteriovenous malformations (AVMs) are a congenital abnormality of blood vessels. They consist of a tangle of abnormal vessels supplied by arterial feeders and often drained by large dilated veins. In this patient, a large AVM is seen arising from the Middle Cerebral artery (MCA). AVMs usually present either with headaches, seizures or bleeding. Larger AVMs are often seen on CT or MRI. Angiography is required to define the vascular anatomy and plan appropriate treatment. Treatment may involve surgical resection, embolization or radiotherapy.
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